Let's calculate 3942 x 4228
3942 × 4228 = 4228 × (3942)
+ 4228 × 2 that results in 8456
+ 4228 × 40 producing 169120
+ 4228 × 900 that results in 3805200
+ 4228 × 3000 that results in 12684000

= 16666776
